อิทธิพลของฤดูกาลและดัชนีอุณหภูมิความชื้นต่อการเกิดรกค้างในโคนมลูกผสมขาวดำ
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ต.ค. 16, 2020
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รกค้าง ฤดูกาล ดัชนีอุณหภูมิความชื้น
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โคนมลูกผสมขาวดำที่คลอดปกติในปี พ.ศ. 2526-2538 ของศูนย์วิจัยและบำรุงพันธุ์สัตว์เชียงใหม่จำนวน 1,039 ตัว รกค้าง 106 ตัว โดยมีอัตราการเกิดรกค้างสูงสุด และต่ำสุด อยู่ในเดือนเมษายนและพฤศจิกายน ตามลำดับ ทั้งนี้ ฤดูกาลไม่มีอิทธิพลต่อการเกิดรกค้าง (P>0.05) ส่วนดัชนีอุณหภูมิความชื้นมีความสัมพันธ์กับอัตราการเกิดรกค้างในทางบวก โดยมีค่าสัมประสิทธิ์สหสัมพันธ์ 0.58 และมีนัยสำคัญทางสถิติ
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References
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Saini, M.S., A.S. Khanna and S.C. Chopra. 1988. Incidence of retention of placenta, its treatment and subsequent fertility on crossbred (Temperate x Zebu) dairy cattle. Indian J. of Animal Production and Management 4(2): 61-65.
Saloniemi, H., Y. Grohn and J. Syvajarvi. 1986. An epidemiological and genetic study on registered diseases in Finnish Ayrshire cattle. II. Reproductive disorders. Acta-Veterinaria-Scandinavica. 27(2): 196-208.
Scharma, M.C, N.N. Pathak, R.P. Verina, N.N. Hung, N.V. Cu, N.H. Lien, D.T. An, H.V. Mai and N.V. Vuc. 1984. Epidemiological study on reproductive disorders of Murrah buffaloes bred in Vietnam. Indian J. Dairy Sci. 37(2): 83-85.
Scherling-Torres, L de J. 1986. Reproductive performance of pregnant Holstein-Friesian heifers imported from the USA and Canada for intensive breeding in the vale of Mexico. Veterinaria, Mexico. 17(1): 71.
Verma, R.P., S.K. Saxena and R.R. Mishra. 1982. Relationship of ambient temperature, vapour pressure and rainfall to reproductive disorders of dairy cattle. Indian J. Dairy Sci. 35(2): 192-194.
Wosu, L.O. and B.M. Anene. 1990. Incidence and seasonality of reproductive disease conditions in small ruminants in Nsukka area, Nigeria. Beitragezur Tropischen Landwirtschaft und Veterinary Medizin. 28(2): 185-189.
Agarwal, S.K., U. Shanker and R.R.Mishra. 1984. Incidence of retained placenta and its effect on fertility in crossbred cattle. Livestock Advisor. 9(12): 49-51.
Etherington, W.G., S.W. Martin, I.R. Dohoo and W.T.K. Bosu. 1984. Interrelationships between ambient temperature, postpartum reproductive events and reproductive performance in dairy cows: a path analysis. Proceedings of the 13th World Congress on Diseases of Cattle, Durban, South Africa, Sep. 17-21, (2): 787-795.
Fraser, C.M., J.A.Bergeron, A. Mays, S.E.Aiell, H.E. Amstutz, J. Armour, D.C.Blood, C.L. Chrisman; F.M. Loew and G.H. Snoeyenbos. 1991. The Merck Veterinary Manual, 7th. ed. Merck 8 Co. , Inc., Rahway, N.J., U.S.A. p 698.
Igono, M.O., G. Bjotvedt and H.T. Sanford-Crane. 1992. Environmental profile and critical temperature effects on milk production of Holstein cows in desert climate. Int. J.Biometeorol. 36: 2, 77-87. Ingraham, R.H., D.D. Gillette and W.D. Wagner. 1971. Relationship of temperature and humidity to conception rate of Holstein cows in subtropical climate. J. of Dairy Sci. 57(4): 476-481.
Rawal, C.V.S. and R. Singh. 1991. Incidence of retention of placenta in buffaloes. Indian J. Animal Sci. 61(8): 841-842.
Saini, M.S., A.S. Khanna and S.C. Chopra. 1988. Incidence of retention of placenta, its treatment and subsequent fertility on crossbred (Temperate x Zebu) dairy cattle. Indian J. of Animal Production and Management 4(2): 61-65.
Saloniemi, H., Y. Grohn and J. Syvajarvi. 1986. An epidemiological and genetic study on registered diseases in Finnish Ayrshire cattle. II. Reproductive disorders. Acta-Veterinaria-Scandinavica. 27(2): 196-208.
Scharma, M.C, N.N. Pathak, R.P. Verina, N.N. Hung, N.V. Cu, N.H. Lien, D.T. An, H.V. Mai and N.V. Vuc. 1984. Epidemiological study on reproductive disorders of Murrah buffaloes bred in Vietnam. Indian J. Dairy Sci. 37(2): 83-85.
Scherling-Torres, L de J. 1986. Reproductive performance of pregnant Holstein-Friesian heifers imported from the USA and Canada for intensive breeding in the vale of Mexico. Veterinaria, Mexico. 17(1): 71.
Verma, R.P., S.K. Saxena and R.R. Mishra. 1982. Relationship of ambient temperature, vapour pressure and rainfall to reproductive disorders of dairy cattle. Indian J. Dairy Sci. 35(2): 192-194.
Wosu, L.O. and B.M. Anene. 1990. Incidence and seasonality of reproductive disease conditions in small ruminants in Nsukka area, Nigeria. Beitragezur Tropischen Landwirtschaft und Veterinary Medizin. 28(2): 185-189.